$E544/58692: Clear Screen
Jump from $E86E:
E544: AD 88 02 LDA $0288 ; High Byte of Screen Memory Address
E547: 09 80 ORA #$80
E549: A8 TAY
E54A: A9 00 LDA #$00
E54C: AA TAX
Jump from $E558:
E54D: 94 D9 STY $D9,X ; Screen Line Link Table
E54F: 18 CLC
E550: 69 28 ADC #$28
E552: 90 01 BCC $E555
E554: C8 INY
Jump from $E552:
E555: E8 INX
E556: E0 1A CPX #$1A
E558: D0 F3 BNE $E54D
E55A: A9 FF LDA #$FF
E55C: 95 D9 STA $D9,X ; Screen Line Link Table
E55E: A2 18 LDX #$18
Jump from $E564:
E560: 20 FF E9 JSR $E9FF ; Clear Screen Line
E563: CA DEX
E564: 10 FA BPL $E560
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